<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
        <meta name="author" content="于浩">
        <title>宝钢集团</title>
        <link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">
        <style>
            main{
                height:300px; 
                margin: -30px 0 0 0;
            }
            .mytitle{

                height: 300px;                
            }
            .bd{
                overflow: hidden;
                height: 100%;
                border: 1px solid gray;
                border-radius: 10px;
            }
            .mytitle1{
                height: 30px;
                background-color: blue;
            }
            .mytitle2{                
                height: 30px;
                background-color: black;
            }
            .mytitle3{                
                height: 30px;
                background-color: blue;
            }
        </style>
    </head>
    <body>
        <nav class="navbar navbar-default" style="margin-bottom: 0;">
            <button class="navbar-toggle" data-toggle="collapse" data-target="#bgnav" type="button">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
            </button>

            <div class="navbar-header">                
                <img src="image/logo.png" alt="宝钢集团">                
            </div>
            <div class="collapse navbar-collapse" id="bgnav">
                <ul class="nav navbar-nav">
                    <li><a href="#">首页</a></li>
                    <li><a href="#">媒体中心</a></li>
                    <li><a href="#">关于我们</a></li>
                    <li><a href="#">业务板块</a></li>
                    <li><a href="#">产品服务</a></li>                    
                </ul>
                <ul class="nav navbar-nav navbar-right">
                    <li>
                        <form class="navbar-form" role="search">
                            <div class="form-group">
				            <input type="text" class="form-control" placeholder="Search">
                            <span class="glyphicon glyphicon-search"></span>
			                </div>
                        </form>
                    </li>
                </ul>
            </div>
        </nav>

        <div>
            <img src="image/banner.png" alt="宝钢图片">
        </div>

        <main class="container">
            <div class="mytitle col-md-4";>
                <div class="bd">
                    <div class="mytitle1">公司动态</div>                    
                </div>
            </div>

            <div class="mytitle col-md-4";>
                <div class="bd">
                    <div class="mytitle2">研究与观点</div>   
                </div>         
            </div>

            <div class="mytitle col-md-4"; >
                <div class="bd">
                    <div class="mytitle3">产品与服务</div>
                </div>            
            </div>
        </main>
        
 









        <script src="bootstrap/js/jquery.min.js"></script>
        <script src="bootstrap/js/bootstrap.min.js"></script>
    </body>
</html>